How do I fix over-smoothed textures and blurred faces in GTA VI at 4K resolution?

GTA VI faces looked blurred at 4K due to DLSS Quality mode. I tried Balanced mode, but it increased blur despite higher FPS. Using GamePP DLSS Calibrator, I raised sharpening from 50 to 75 and set render to 100%. RivaTuner confirmed sharpness recovery. This switch restored the detail I was missing.